Which of the following is an example of trade dress?

Trade dress refers to the visual appearance of a product or its packaging that signifies the source of the product to consumers. It can encompass elements such as shape, color, and design that are distinctive and identify the brand, contributing to the overall consumer perception and experience.

In the case of the Coca Cola bottle shape and its distinctive red color, both elements contribute to the recognizable identity of the Coca Cola brand. The shape of the bottle is unique and widely associated with the product, making it an essential part of the brand's visual identity. This distinctiveness qualifies it as trade dress, as it evokes immediate recognition among consumers.

The other choices, while they may consist of recognizable symbols or branding elements, do not function as trade dress in the same way. The Microsoft Windows logo, for example, is a trademark, which protects specific symbols or phrases that identify a brand or product but is not about the overall appearance of the product itself as trade dress would be. Similarly, Pepsi branding and the Amazon arrow logo represent logos or trademarks rather than the overall visual impression of a product's packaging or shape, which is the defining characteristic of trade dress.